Strainer



Patented Nov. 25 1930 i l p, p

UNETED STATES PATENT OFFICE Davin LARKIN, or Kmkwoon. ssoum V i 7 h s'rnnmnn Application filed May 27, 1929. -Seria11q'o. 266,431. a

This invention relates to strainers, and has ing the same clear of the casing 1. The more particular reference to a strainer especover 9 is provided with laterallyprojecting cially adapted for use in straining oils and bifurcated lugs 12,.th1'ough which are adapted the like. 1 to pass bolts 18, pivotally'connected to lugs 5 An object of the invention is to provide a 1 1, formed on .the wall .2 of the. casingl on 55 strainer having a diaphragm which maybe either side ofthe said bolts. The bolts 13 i readily and easily removed for cleaning. are. provided with win nuts 15, by means Another object is to provide a removable. of which the cover 9 is firmly fastened down supporting frame for the diaphragm to which in place on the casing l. r 1

lathe latter may be easily applied or from which A plurality of concentric vertical strain- 69 it may be easily removed and replaced. ing diaphragmsfor partitions 16and 17 di- A further object'is to provide-a supporting vide the easing into ia plurality of concentric frame for the diaphragm which will reinforce compartments18, 19, ai1 d' 20. The partitions i i the same against the flow of oil While at the 16 and 17 are supported on suitable respective 15 same time offering a minimum obstruction to supporting fraines2l and 22. ,The frames 21 65 the flow ofthe oil; o andm22.eachcomprisenpper and lowerend A further object is to provide a discharge members or annular plates 23, havinginner outlet which is readily accessible for the pur- "and outer annular edges 24 and .25 respecpose of cleaning. tively. T ie portion of the plates 23 adjacent 2 Other objects and advantages will appear the inner edge 24are thicker thanthe por- 2 i in the course of the following description of tions juxtaposed to the peripheral edge 25, a preferred embodiment of this invention. owing to an ofiset or shoulder 26 formed on In the accompanying drawings formlng the inner sides of the plates intermediately part of this specification,- in which like numof the edges 24 and25. The shoulder26 pref- 5 bers of reference denote like parts wherever b1 f ll th i h f convex 75 they occur, polygon, and a series of vertical bars 27 con- Figure 1 is a vertical central sectional view t th upper and low lat s, Th b r of the strainer taken on the lin 1- in 27 are elongated in cross-section in a radial Figure 2; direction, being relatively thin transversely 9 Figure 2 is an eleva i n of h Same; thereto, so as toafford ample resistance to 8 Figure 3 is a plan view with the cover partdi lly di t d fo s hil t th m ly broken away to reveal the inner structure; ti r nti g a ini um urfa transand r 1 versely to the flow of oil through the strainer. Figure lis ahorizontal sectional view taken Th Outer dg 28 f th b 27 form on the line 1- 1 in Figure 1. tinuations of the edges 29 of the shoulder 26. 5

The illustrated structure comprises a pas The t i i or filt i p titi n le a d ing 1, having a lateral, preferably cylindrlcal, 17 m b f d f n it bl f t wall 2 and a bottom wall 3. The lower end porous m t i h f bl copper screen of the wall 2 continues below the wall 3 to l th f h d i f wi it bl for form supporting legs or standards 5. T e the purpose of-straining impurities from the 9 pp end 0f the Wall 2 enlarges laterally oil or other fluid passed throughthe strainer. in all Outer K111111121 flange and time flange The screens '16 and 17 are stretched around 6 has an annular recess 7 in its top face for th row f 1331 527 and Ov lap th h uld r the reception of an annular flange 8 formed 26, The lower plates 23 support the strainon the under side of a cover 9 for the open ingunits,on the bottom? of the s g, 5 top of the casing 1. Suitable packing, prefboth upper: and lower plates 23 constitute erably an asbestos ring gasket 10, is intermeans for namtaln ng the umts 1n IBSLJGClZlVG. posed between the bottom face of the flange 8 predetermined poslt ons 1n the casing 1, and the retracted face of the recess 7. The The outer annular edge 25 of embracing COX-er 9 i ided with a handle 11 for liftplates 23 co'operates with the inner side 30 9 of wall 2 to maintain the diaphragm 17 in proper position in the casing, and the outer edge 25 of embraced plates 23 co-operates with inner edge 24 of embracing plates 23 to maintain the diaphragm 16 in its predetermined position.

The oil or other fluid to be strained is supplied to chamber or compartment 20 through a suitable pipe connection to the tapped hole 31 in the wall 2. The oil rises in the compartment 20 and filters through the screen 17 into compartment 19, rising therein and filtering through screen 16 into compartment 18, from whence it passes through an opening 32 in the bottom wall 3 into a pipe 33, preferably cast integral with the wall 3. The pipe 33 extends along the bottom of the wall 3 from one side of the strainer to the other. One end 34 of the pipe 33 is tapped for a plug 35, and the other end 36 is tapped for connection to a suitable means for leading off the oil discharged from the strainer through the opening. The sediment and impurities settle to the bottom of the compartments 18, 19, and 20, and do not clog the openings in the screens 16 and 17. lVhen sufiicient sediment has collected, the cover 9 may be removed and the sediment removed. The pipe 33 may be easily cleaned or flushed by removing the plug 35 to provide access thereto. It will be observed that the bars 27 reinforce the screens 16 and 17 against the rush of oil thereagainst. The bars 27 may be cast integral with the plates 23, or they may be soldered thereto, or may be fitted and secured in slots in the said plates.

Having thus fully described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it is evident that many minor changes may be made therein without departing from the spirit of this invention or the scope of the following claims.

I claim:

1. In a strainer, a straining unit comprising a pair of annular end plates of the same shape and dimensions, said plates having arcuate inner and outer edges, the plates having opposed shoulders at their inner faces, the

inner edges of said shoulders being arcuate and flush with the inner edges of the plates, the outer edges of the shoulders being poly, onal in plan, bars connected with the vertices of the shoulders and bridging the space between the plates and straining material surrounding the series of bars and attached at its edges to the polygonal edges of the shoulders.

2. In a strainer, a straining unit comprising a pair of annular end plates of the same shape and dimensions, said plates having arcuate inner and outer edges, the plates having opposed shoulders at their inner faces, the inneredges of said shoulders being arcuate and flush with the inner edges of the plates,

signature.

DAVID LARKIN. 

